Android(安卓)BroadcastReceiver实例Demo

该文主要讲解Android四大组件之一：BroadcastReceiver的初步使用，和其他三大组件一样，都需要在AndroidManifest.xml文件中注册（当然，广播注册的另一种方式是在代码中）。

实现效果图：

源代码：

布局文件：

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context=".MainActivity" >    <Button        android:id="@+id/button"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:layout_alignParentTop="true"        android:layout_centerHorizontal="true"        android:text="点击发送广播" /></RelativeLayout>

MainActivity:

package com.android_broadcastreceiver;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.Button;public class MainActivity extends Activity {private Button button;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);button = (Button) findViewById(R.id.button);button.setOnClickListener(new View.OnClickListener() {@Overridepublic void onClick(View v) {Intent intent = new Intent();/** * 三个广播在manifest.xml文件中的Action设置的都是myaction，所以发送广播的时候，这三个都可以收到广播 * 。 */intent.setAction("myaction");intent.putExtra("name", "梅西！！！");sendBroadcast(intent);}});}}

MyBroadcastReceiver:

package com.android_broadcastreceiver;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class MyBroadcastReceiver extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {String name = intent.getExtras().getString("name");Toast.makeText(context, "广播1已发送..."+name, Toast.LENGTH_SHORT).show();}}

MyBroadcastReceiver2:

package com.android_broadcastreceiver;import android.app.NotificationManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.support.v4.app.NotificationCompat;/** * 以通知的形式展示广播 * */public class MyBroadcastReceiver2 extends BroadcastReceiver {private NotificationManager manager;@Overridepublic void onReceive(Context context, Intent intent) {manager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);String name = intent.getExtras().getString("name");NotificationCompat.Builder builder = new NotificationCompat.Builder(context);builder.setTicker("广播2来了！！！");builder.setSmallIcon(R.drawable.ic_launcher);builder.setContentTitle("电量不足！！！");builder.setContentText("电量还剩10%"+"快通知："+name);manager.notify(1001, builder.build());}}

MyBroadcastReceiver3:

package com.android_broadcastreceiver;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.widget.Toast;public class MyBroadcastReceiver3 extends BroadcastReceiver {@Overridepublic void onReceive(Context context, Intent intent) {String name = intent.getExtras().getString("name");Toast.makeText(context, "广播3已发送..."+name, Toast.LENGTH_SHORT).show();}}

AndroidManifest.xml:

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.android_broadcastreceiver"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="11"        android:targetSdkVersion="18" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name="com.android_broadcastreceiver.MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>        <receiver android:name=".MyBroadcastReceiver" >            <intent-filter>                <action android:name="myaction" />            </intent-filter>        </receiver>        <receiver android:name=".MyBroadcastReceiver2" >            <intent-filter>                <action android:name="myaction" />            </intent-filter>        </receiver>        <receiver android:name=".MyBroadcastReceiver3" >            <intent-filter>                <action android:name="myaction" />            </intent-filter>        </receiver>    </application></manifest>

比较简单，需要源码的读者可以到我的资源中下载。

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